Initialize trainer with None (Lightning-AI#4847)

Co-authored-by: Sean Naren <[email protected]>
Co-authored-by: chaton <[email protected]>
Co-authored-by: edenlightning <[email protected]>

Author: 4 people

pytorch_lightning/accelerators/ddp_accelerator.py

@@ -39,7 +39,7 @@
 
 class DDPAccelerator(Accelerator):
 
-    def __init__(self, trainer, cluster_environment=None, ddp_plugin=None):
+    def __init__(self, trainer=None, cluster_environment=None, ddp_plugin=None):
         """
         Runs training using DDP strategy on a single machine (manually, not via cluster start)